Fluid-conducting fitting



H. F. PECK.

FLUID CONDUCTING FITTING.

APPLICATION FILED JULY 13, 1920.

1,368, 196, Patented Feb. 8, 1921.

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1,368,196; concern: [Be it "known that I, HARRY F. P EOK, a citizen of the United States, residing at Wakefield, in thecounty of Middlesex and State of Massachusettahave inventednew and useful Improvements-in Fluid-Conduct- 'ing Fittings, of which the following is a specification.

This invention relates particularly to fluid-conducting means including a flttmg havin an internal thread and forming a conduit element, and an entering member forming another conduit element and having an external thread engageable with the. 1nternal thread of the fitting.

The invention has for its object to provide a fittin having a compressible packing ring, a apted to have a fluid-tight bearmg simultaneously on the externally threaded periphery and on the end'face of an entering member. j-

he invention isembodied in the improvee ments hereinafter described and claimed.

'Of the accompanying drawings forming a art of this specification,--

igure 1 shows in longitudinal-section a fitting embodying the invention, and a portion of an entering member engaged there with.

Fig. 2 is a section on line 2-2 of Fig. 1.-

Fig. 3 is an. enlargement of a portion of Fig. 4 is a view similar toFi'g. 3, showing the packing-ring as originally formed.

Fig. 5 is a fragmentary view, showlng a portion of the packing-ring in section.

Fig. 6 is a longitudinal section of another form of fitting embodying the invention.

The same reference characters indicate the same parts in all of the figures.

In the drawings, 12 represents a fitting having a contracted inner bore portion 13, an outer bore portion 14, having an internal thread and of larger diameter than the portion 13, and an intermediate annular groove wall of the groove 15 has an inner portion facing the outer end of the bore portion '14 7 and an outer portion facing the longitudinal*t- "aicontracted inner bore portion, an outer axis of the fitting and formedto surround v p .icontiacte'd portion, and provided with an internal thread, and an intermediate annular "'fgrooye, concentric with said bore portions,

and be spaced from portions of an external thread 16 on an entering memberv .17. In said groove ,is inserted a soft metal.

ackin ring 'preferably of lead said ,ring P g i tion "facing; the outer end of the threaded including an annular body 18 seated on the Specification of Letters Patent.

f annular flange 19, seated on the outerportlon of .the groove wall. The ring may be formed in cross section as shown by Fig. 5, so that it may be forced through the larger bore portion 14, and then expanded by a suitable instrumentality,. until it has the form in cross section shown by Fig. 4, and

in part by dotted lines in Fig. 5, and con Fig. 3, by portions of the external thread 16 of the entering member 17. .The ring 'body 18' is adapted to be compressed between the annular end face'20 of the entering member and a portion of the wall of the groove 15, so that. when the entering member is in place, the packing-ring has a fluid-tight bearing on a portion of the threaded periphery and on the end face of the entering member, whereby an angular joint is formed,

' having ample area to prevent leakage between the fitting and the entering member. 'llhe depth of the portion of the groove which receives the flange 19 is greater than Patented Feb. 8, 1921. 'Applicationmed Jul is, 1930; Serial No. 395,952.

the depth of the screw-threads 16, and the v inner face of the flange 19 is substantially flush with the outer angles of the internal thread convolutions in the bore portion 14,; so that portions of the entering member,

thread 16 are caused to cut their way into the flange 19 and are entirely embedded therein.

The portion of the groove 15 which receives thebody-IS is preferably undercut to form an'annular lip 22 projecting within a portion I The material of the inner face of the body. of the ring displaced by the thread of the enterlng member may become a part of the body portion 18, and cause the body portion I to protrude between the lip 22 and the annular face 20 of the enteringmember.

2 The fitting, WhiCh'iS shown-by Fig. 1,as

a pipe-coupling, may be formed as avalve body orcasing having a tapered seat 25 for a plug valve, as I claim:

shown by Fig. 6.

borelgportion' of larger diameter than the the-wall'ofysaid groove having an inner porbore portion, and an outer portion facing A fitting of the character stated, having formed to surro nd and be spaced from p ortions of an external thread on an enterlng member engaged with the said internal thread, and a soft metal packing-ringhavan annular body seated on said mner wal portion and an annular flange seated on said outer wall portion, the inner face of" said flange being substantially flush withthe outer angles of the internal thread convolutions in the outer bore portion, so that said flange is adapted to be lnternally threaded by the external thread of said enteringr member, and the ring bodyv being adapted to be compressed between the an- 15 nular end face of the enteringmember and the inner portion of thegroove wall, so that the ring has a fluid tightbearing on a 'portion of the threaded periphery-and on the",

annular end face of the entering member. 20

In testimony whereof, I-have aifixed my signature. I g j, i 

